If they're fixable, I fix and resale, if not check if any of the parts are sellable, or cannibalize some for the next mower...scrap the rest.

Old Lawnboys have a sort of cult following around here...vintage Toro's with the cast Al decks...old Snappers, Honda's. Best to check resale before you scrap it on the older stuff...parts aren't cheap or easy to find for some of those, and they're still out there.

Find a few mowers every spring...still cutting grass with my 21+ yr old self-propelled Honda that climbs hills better than I do some days, haven't found one good enough to replace it yet.